Make sure fs is only updated if dev.FS() succeeds (#11)

socket.go

@@ -112,14 +112,14 @@ func handleConnection(conn net.Conn, dev *infinitime.Device, fs *blefs.FS) {
 		// Get new FS
 		newFS, err := dev.FS()
 		if err != nil {
-			fs = nil
 			log.Warn().Err(err).Msg("Error updating BLE filesystem")
-		}
+		} else {
 			// Set FS pointer to new FS
 			*fs = *newFS
 			// Reset updateFS
 			updateFS = false
 		}
+	}
 
 	// Create new scanner on connection
 	scanner := bufio.NewScanner(conn)